Physics · Electromagnetism
If a free surface charge density σf is present at the interface between two dielectric media, then which of the following boundary conditions is correct? (Here 'n' refers to the normal direction and 't' to the tangential direction)
- 1D2t - D1t = σf
- 2ε2E2n - ε1E1n = 0
- 3E1t - E2t = σf
- 4D2n - D1n = σf✓
Correct answer
D2n - D1n = σf
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